Insanity-Loid

Insanity-Loid (狂気 - ロイド), a combination of the terminology Insanity and Vocaloid, pertains to fanmade Vocaloids representing evil, hostility, or depression.

Depiction
Insanity Vocaloids are known for their insane or, almost, yandere-like tendencies. Most fanmade characters yield weapons as their character item of choice. Insanity Vocaloids tend to have a ghostly pale complexion and an immense craving for blood. Some of the fanmade characters wear dark clothing and are even made to look depressed and somewhat creepy in nature.

History
Insanity Vocaloids were first introduced on February 23, 2015. The first official Insanity-Loids, Kanashimi Min/Ten, being introduced on December 25, 2014.

Insanity-Loid on the Fanloid Wiki

 * Kanashimi Min/Ten, are fanmades based on Vocaloids Kagamine Rin and Kagamine Len.
 * Kukone Zei, is a fanmade based on Utau Tei Sukone.
 * Znon & Hanon, are fanmades based on Vocaloids anon & kanon.
 * Dākusaundo Shi, is a fanmade based on Vocaloid Hatsune Miku.
 * Shadow Luka, is a fanmade based on Vocaloid Megurine Luka.
 * Gōkyū Itami, is a fanmade based on Utau Ritsu Namine.
 * Kanashimi Minto/Tenka, are fanmades based on Kanashimi Min/Ten.
 * Neko Cherry, is a fanmade based on Vocaloid CUL.

Trivia

 * Most Insanity-Loids are the uncontrollable or insane versions of their Vocaloid/Utau counterparts.